Quick answers
- Does Colleen K. Zenczak accept Medicare assignment?
- Medicare's clinician data says Colleen K. Zenczak may accept Medicare assignment (as of October 2, 2026). Ask the office whether they accept it for your visit.
- How many Medicare patients does Colleen K. Zenczak see?
- In 2024, CMS data shows 326 Original Medicare patients and 687 services for Colleen K. Zenczak. This counts Original Medicare only and measures volume, not quality.
- What is Colleen K. Zenczak's NPI number?
- 1043732613. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Colleen K. Zenczak, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 326 |
|---|---|
| Services billed to Medicare | 687 |
| Different services or procedures | 7 |
| Participating Medicare provider | Yes |
| Average age of these patients | 77 |
Most frequent services
- Test to assess middle ear function (92567)315 services
- Comprehensive hearing and speech recognition test (92557)304 services
- Test for hearing various pitches using earphone and device placed against the bone (92553)27 services
- Test for ability to detect and repeat spoken words (92555)25 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High cholesterol75%
- High blood pressure66%
- Arthritis47%
- Osteoporosis28%
- Diabetes25%
- Ischemic heart disease21%
Practice locations
Addresses where Colleen K. Zenczak is enrolled with Medicare (CMS data updated October 2, 2026).
- 5255 Loughboro Road NW, Sibley Memorial HospitalWashington, DC 20016 (202) 660‑6500
- 6420 Rockledge DrBethesda, MD 20817 (301) 896‑6717
- 8600 Old Georgetown RdBethesda, MD 20814 (301) 896‑2578
Group practices
Medicare enrollment lists Colleen K. Zenczak as a member of these groups (CMS data updated October 2, 2026).
- Johns Hopkins University2,909 clinicians in the group
- Johns Hopkins University713 clinicians in the group
Specialties
- Qualified Audiologistprimary
Find other clinicians: Qualified Audiologist, District of Columbia →
Other audiologists in Washington
Clinicians with the same Medicare primary specialty in Washington, DC — not a recommendation.
Other clinicians in Johns Hopkins University
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | AU |
|---|---|
| Graduation year | 2017 |
| Gender (as listed) | Female |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1043732613 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians